Alert archive / North Dakota / Cavalier County
Weather alerts in Cavalier County, North Dakota, 2020
116 weather alerts in 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Cavalier County and its neighbors
Each county as a circle sized by its count in 2020. Tap one for its archive.
- Alerts
- 116
- Warnings
- 26
- Watches
- 14
- Advisories
- 52
- Busiest month
- July26 alerts
- Busiest day
- July 17, 20208 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 1 tornado warnings covering Cavalier County in 2020 had a tornado report inside them.
Cavalier County, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 1 | 0 | 100% | 0 | ||
| Severe thunderstorm warnings | 14 | 12 | 14% | 11 | 100% | 21 min |
| Flash flood warnings | 0 | 0 |
Each office's whole area, 2020
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Grand Forks, ND: tornado warnings | 42 | 14 | 67% | 52 | 56% | 8 min |
| NWS Grand Forks, ND: severe thunderstorm warnings | 308 | 261 | 15% | 707 | 85% | 26 min |
| NWS Grand Forks, ND: flash flood warnings | 12 | 11 | 8% | 21 | 90% | 201 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
The alerts
Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 4, 3:08 PM CST | Wind Advisory | FGF | 24 hr |
| Jan 7, 3:31 PM CST | Wind Chill Advisory | FGF | 20 hr |
| Jan 9, 2:11 PM CST | Wind Chill Advisory | FGF | 22 hr |
| Jan 10, 11:56 AM CST | Wind Chill Advisory | FGF | 24 hr |
| Jan 14, 6:56 AM CST | Wind Chill Advisory | FGF | 56 hr |
| Jan 15, 2:53 PM CST | Winter Storm Watch | FGF | 38 hr |
| Jan 15, 9:52 PM CST | Wind Chill Warning | FGF | 9 hr |
| Jan 15, 9:52 PM CST | Wind Chill Advisory | FGF | 17 hr |
| Jan 16, 3:17 PM CST | Wind Chill Advisory | FGF | 8 hr |
| Jan 16, 3:17 PM CST | Winter Weather Advisory | FGF | 31 hr |
| Jan 17, 4:39 AM CST | Blizzard Warning | FGF | 37 hr |
| Jan 18, 3:05 PM CST | Wind Chill Advisory | FGF | 21 hr |
| Jan 19, 2:25 PM CST | Wind Chill Advisory | FGF | 22 hr |
| Jan 24, 5:08 AM CST | Dense Fog Advisory | FGF | 4 hr |
| Jan 25, 10:14 PM CST | Winter Weather Advisory | FGF | 23 hr |
| Jan 27, 8:57 PM CST | Dense Fog Advisory | FGF | 14 hr |
| Jan 29, 2:43 AM CST | Dense Fog Advisory | FGF | 9 hr |
| Jan 30, 4:08 AM CST | Winter Weather Advisory | FGF | 8 hr |
| Feb 1, 1:34 PM CST | Wind Advisory | FGF | 21 hr |
| Feb 6, 2:03 PM CST | Wind Chill Advisory | FGF | 20 hr |
| Feb 10, 3:31 AM CST | Winter Storm Watch | FGF | 35 hr |
| Feb 11, 2:51 PM CST | Winter Weather Advisory | FGF | 20 hr |
| Feb 11, 7:01 PM CST | Wind Chill Warning | FGF | 41 hr |
| Feb 12, 6:08 AM CST | Wind Chill Warning | FGF | 30 hr |
| Feb 12, 6:08 AM CST | Winter Weather Advisory | FGF | 4 hr |
| Feb 13, 2:31 PM CST | Wind Chill Advisory | FGF | 21 hr |
| Feb 15, 3:51 AM CST | Wind Chill Advisory | FGF | 28 hr |
| Feb 18, 2:30 PM CST | Wind Chill Advisory | FGF | 20 hr |
| Feb 19, 2:26 PM CST | Wind Chill Advisory | FGF | 19 hr |
| Feb 29, 2:46 PM CST | Wind Advisory | FGF | 27 hr |
| Mar 6, 10:06 AM CST | Wind Advisory | FGF | 7 hr |
| Apr 1, 4:37 AM CDT | Winter Storm Watch | FGF | 23 hr |
| Apr 1, 3:30 PM CDT | Winter Storm Warning | FGF | 42 hr |
| Apr 6, 11:43 PM CDT | Dense Fog Advisory | FGF | 10 hr |
| Apr 8, 3:19 AM CDT | Wind Advisory | FGF | 17 hr |
| Apr 24, 4:32 PM CDT | Special Weather Statement | FGF | 58 min |
| Apr 26, 3:51 AM CDT | Dense Fog Advisory | FGF | 5 hr |
| May 8, 3:23 PM CDT | Winter Weather Advisory | FGF | 21 hr |
| May 14, 5:39 AM CDT | Dense Fog Advisory | FGF | 3 hr |
| May 18, 1:46 PM CDT | Red Flag Warning | FGF | 6 hr |
| May 29, 2:30 PM CDT | Frost Advisory | FGF | 17 hr |
| Jun 7, 3:06 PM CDT | Tornado Watch | SPC | 7 hr |
| Jun 7, 9:46 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 7, 11:33 PM CDT | Mesoscale Discussion | SPC | 87 min |
| Jun 14, 3:15 AM CDT | Wind Advisory | FGF | 16 hr |
| Jun 16, 3:13 AM CDT | Wind Advisory | FGF | 18 hr |
| Jun 17, 3:20 AM CDT | Special Weather Statement | FGF | 55 min |
| Jun 17, 2:44 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 17, 5:21 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 17, 6:38 PM CDT | Severe Thunderstorm Warning | FGF | 37 min |
| Jun 20, 1:18 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Jun 30, 6:04 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 30, 6:27 PM CDT | Special Weather Statement | FGF | 48 min |
| Jun 30, 8:38 PM CDT | Mesoscale Discussion | SPC | 67 min |
| Jun 30, 10:05 PM CDT | Special Weather Statement | FGF | 55 min |
| Jul 2, 11:23 PM CDT | Special Weather Statement | FGF | 37 min |
| Jul 4, 3:23 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 7, 11:44 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 8, 1:33 AM CDT | Severe Thunderstorm Warning | FGF | 57 min |
| Jul 8, 1:37 AM CDT | Mesoscale Discussion | SPC | 113 min |
| Jul 8, 2:20 AM CDT | Special Weather Statement | FGF | 40 min |
| Jul 8, 2:22 AM CDT | Severe Thunderstorm Warning | FGF | 53 min |
| Jul 13, 10:48 AM CDT | Special Weather Statement | FGF | 57 min |
| Jul 13, 11:05 AM CDT | Severe Thunderstorm Warning | FGF | 55 min |
| Jul 13, 11:34 AM CDT | Mesoscale Discussion | SPC | 116 min |
| Jul 13, 11:54 AM CDT | Severe Thunderstorm Warning | FGF | 38 min |
| Jul 13, 12:23 PM CDT | Special Weather Statement | FGF | 67 min |
| Jul 13, 1:19 PM CDT | Special Weather Statement | FGF | 56 min |
| Jul 13, 2:16 PM CDT | Special Weather Statement | FGF | 59 min |
| Jul 17, 12:30 PM CDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jul 17, 2:01 PM CDT | Severe Thunderstorm Warning | FGF | 59 min |
| Jul 17, 2:22 PM CDT | Severe Thunderstorm Warning | FGF | 53 min |
| Jul 17, 2:25 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Jul 17, 2:33 PM CDT | Severe Thunderstorm Warning | FGF | 57 min |
| Jul 17, 2:56 PM CDT | Severe Thunderstorm Warning | FGF | 64 min |
| Jul 17, 3:54 PM CDT | Severe Thunderstorm Warning | FGF | 51 min |
| Jul 17, 6:04 PM CDT | Mesoscale Discussion | SPC | 116 min |
| Jul 25, 3:58 PM CDT | Severe Thunderstorm Warning | FGF | 30 min |
| Jul 25, 4:29 PM CDT | Special Weather Statement | FGF | 46 min |
| Aug 9, 10:24 AM CDT | Special Weather Statement | FGF | 66 min |
| Aug 9, 11:24 AM CDT | Special Weather Statement | FGF | 66 min |
| Aug 9, 11:28 AM CDT | Severe Thunderstorm Warning | FGF | 62 min |
| Aug 9, 11:42 AM CDT | Tornado Warning | FGF | 36 min |
| Aug 9, 12:21 PM CDT | Severe Thunderstorm Warning | FGF | 54 min |
| Aug 14, 4:02 AM CDT | Dense Fog Advisory | FGF | 5 hr |
| Aug 20, 7:17 AM CDT | Severe Thunderstorm Warning | FGF | 30 min |
| Aug 21, 5:44 AM CDT | Dense Fog Advisory | FGF | 3 hr |
| Aug 23, 4:23 AM CDT | Dense Fog Advisory | FGF | 6 hr |
| Aug 30, 11:22 AM CDT | Special Weather Statement | FGF | 53 min |
| Sep 1, 3:38 AM CDT | Wind Advisory | FGF | 16 hr |
| Sep 2, 2:53 PM CDT | Wind Advisory | FGF | 12 hr |
| Sep 2, 6:29 PM CDT | Special Weather Statement | FGF | 46 min |
| Sep 6, 3:32 AM CDT | Freeze Watch | FGF | 23 hr |
| Sep 6, 3:32 AM CDT | Wind Advisory | FGF | 18 hr |
| Sep 7, 2:48 AM CDT | Freeze Watch | FGF | 36 hr |
| Sep 7, 2:48 AM CDT | Freeze Warning | FGF | 30 hr |
| Sep 8, 2:54 PM CDT | Freeze Warning | FGF | 18 hr |
| Sep 16, 3:37 AM CDT | Frost Advisory | FGF | 28 hr |
| Sep 17, 9:44 PM CDT | Frost Advisory | FGF | 11 hr |
| Sep 29, 3:26 PM CDT | Wind Advisory | FGF | 28 hr |
| Oct 1, 3:41 PM CDT | Frost Advisory | FGF | 16 hr |
| Oct 5, 2:39 PM CDT | Fire Weather Watch | FGF | 13 hr |
| Oct 6, 3:31 AM CDT | Wind Advisory | FGF | 11 hr |
| Oct 6, 3:40 AM CDT | Red Flag Warning | FGF | 12 hr |
| Oct 30, 3:54 AM CDT | High Wind Watch | FGF | 10 hr |
| Oct 30, 1:58 PM CDT | Wind Advisory | FGF | 38 hr |
| Oct 31, 10:13 AM CDT | High Wind Warning | FGF | 11 hr |
| Nov 7, 2:14 PM CST | Wind Advisory | FGF | 32 hr |
| Nov 7, 9:09 PM CST | Dense Fog Advisory | FGF | 6 hr |
| Nov 19, 2:46 AM CST | Winter Weather Advisory | FGF | 21 hr |
| Nov 24, 3:36 AM CST | Winter Weather Advisory | FGF | 11 hr |
| Dec 11, 8:20 PM CST | Dense Fog Advisory | FGF | 10 hr |
| Dec 21, 4:30 AM CST | Winter Storm Watch | FGF | 35 hr |
| Dec 22, 3:28 PM CST | Blizzard Warning | FGF | 28 hr |
| Dec 22, 3:28 PM CST | Winter Weather Advisory | FGF | 21 hr |
| Dec 23, 3:05 PM CST | Wind Chill Advisory | FGF | 24 hr |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20192021
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.